Q1. An electric heating element is immersed in a tank. A solvent at 15°C with heat capacity 2.1 J/g *Cis fed into the tank at a rate of 15 kg/h. Heated solvent is discharged at the same flow rate. The tank is filled initially with 125 kg cold solvent at 10°C. The rate of heating the electric coil is 2000 W. a. Write a differential equation for the energy balance. (1 marks) b. Simplify the equations by inserting the suitable values (1 marks) C. Solve using the SIMULINK (8 marks)